plugin-mount

Placement	compiled-in (in-process)
Source	github.com/opencharly/charly/candy/plugin-mount
Version	2026.176.2400
Candy	plugin-mount

This plugin is listed in charly/charly.yml’s compiled_plugins:, so its providers are compiled into the charly binary and register in-process.

Providers

The reserved words this plugin serves:

• mount — verb class

What it does

The mount MULTI-ROLE state-provision verb relocated into a candy. CHECK: findmnt the mountpoint via the live check engine and match source/filesystem/opts. ACT: render an idempotent findmnt || mount. A HOST-COUPLED verb on the sdk/kit contract (CheckVerbProvider + ProvisionActor), so it is COMPILED-IN-ONLY; matchers reuse sdk.MatchAll.

Parameter schema

The CUE schema below is the authoritative grammar for this plugin’s input. It is the same single source that generates the plugin’s Go parameter types and answers the runtime Describe RPC, so this page cannot disagree with either.

schema/mount.cue

// The BUILT-IN `mount` plugin's OWN CUE schema — the typed plugin_input for the `mount`
// verb (a findmnt probe in do:assert, a `mount` in do:act). It is the SINGLE SOURCE for
// this plugin's params, used two ways (the same contract the reference examplerunverb
// and core `spec` use):
//
//  1. GENERATE the Go param struct — `cue exp gengotypes` (driven by task cue:gen,
//     which wraps this with `package params` + `@go(params)`) emits
//     ../params/cue_types_gen.go, so the provider decodes plugin_input into a TYPED
//     struct, never a hand-parsed map.
//  2. VALIDATE authored input AT RUNTIME — the builtin serves this source over the
//     Describe channel (InProcTransport) exactly like an external serves it over
//     gRPC; the host splices it onto the base (base ++ plugin) and validates every
//     authored `mount` step's plugin_input against #MountInput.
//
// SELF-CONTAINED: it references NO base def — the matcher shape `opt` reproduces
// standalone under plugin-private def names (#MountMatcherList / #MountMatcher /
// #MountMatchOp, so there is NO collision with the base #MatcherList / #Matcher /
// #MatchOpMap when base ++ plugin compiles) — so it compiles standalone (gengotypes +
// the load-gate compile) AND splices onto the base.
//
// `mount` is DUAL-NATURED — a state-provision verb that is BOTH a CheckVerbProvider
// (RunVerb → r.runMount, the findmnt probe that keeps the live *Runner) AND a
// ProvisionActor (RenderProvisionScript → mount, rendered at install emit AND at runtime
// act). `mount_source`/`filesystem`/`opt` were base #Op fields read ONLY by the `mount`
// verb, so all three MOVE here when `mount` extracts and leave #Op entirely.
#MountInput: {
  // mount — the mountpoint `findmnt` probes (assert) / `mount` targets (act). The verb
  // discriminator.
  mount: string @go(Mount)
  // mount_source — optional expected source device (assert) / the source argument (act).
  mount_source?: string @go(MountSource)
  // filesystem — optional expected fstype (assert) / `-t` flag (act).
  filesystem?: string
  // opt — optional goss-style matchers the mount options must satisfy (assert) / `-o`
  // flag value (act). Reproduces the base #MatcherList shape standalone (scalar / single
  // operator-map / list).
  opt?: #MountMatcherList @go(Opts)
}

// #MountMatcherList mirrors the base #MatcherList: a single matcher OR a list.
#MountMatcherList: (#MountMatcher | [...#MountMatcher])

// #MountMatcher mirrors the base #Matcher: a bare scalar (implicit match) or a
// single-operator map.
#MountMatcher: (string | bool | number | #MountMatchOp)

// #MountMatchOp mirrors the base #MatchOpMap: exactly one matcher operator key.
#MountMatchOp: {equals: _} | {not_equals: _} | {contains: _} | {not_contains: _} | {matches: _} | {not_matches: _} | {lt: _} | {le: _} | {gt: _} | {ge: _}

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See also the candy reference for this candy’s install surface.